A 45-45-90 triangle is a special kind of right triangle, because it’s isosceles with two congruent sides and two congruent angles. Since it’s a right triangle, the length of the hypotenuse has to be greater than the length of each leg, so the congruent sides are the legs of the triangle.
Read MoreA 30-60-90 is a scalene triangle and each side has a different measure. Since it’s a right triangle, the sides touching the right angle are called the legs of the triangle, it has a long leg and a short leg, and the hypotenuse is the side across from the right angle. In this lesson we’ll look at how to solve for the side lengths of a 30-60-90 triangle.
Read MoreIn this lesson we’ll look at how to find the area of a triangle, which is equivalent to half of the product of the base and the height, A=(1/2)bh. The area is always in units of length^2 (“length squared”).
Read MoreIn this lesson we’ll look at how to use the Pythagorean theorem to find the length of one side of a right triangle, which is a triangle in which one of the angles is a right angle, that is, a 90º angle) if the lengths of the other two sides are known.
Read MoreIn this lesson we’ll look at different types of triangles and how to use Pythagorean inequalities to determine what kind of triangle we have based on their angle measures and side lengths.
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